<span>A "dilute specimen" is a urine sample that has a higher than average water ... even if the drug is detected, it will not be marked as a positive result because ... Powdered urine can be purchased online in packets, and then mixed with water to form urine. ... so they would report your test as negative andyou'd get hired anyway.</span><span>
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Energy was given out in the process as such the reaction must be exothermic given the loss of energy.
<h3>What is a reaction profile?</h3>
The reaction profile shows the the interaction between substances. Now the vertical axes shows the energy while the horizontal axes shows the course of the reaction. The hump at the top of the profile shows the activation energy. The activation energy is the maximum energy that is required for reactants to cross the barrier and become products.
Now we know that the endothermic reaction is one in which energy is taken in while an exothermic reaction is one in which energy is given out.
As such we can see from the graph that the energy of the reactants is greater than that of the products. This implies that energy was given out in the process as such the reaction must be exothermic given the loss of energy.
Learn more about exothermic reaction:brainly.com/question/10373907
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<u>Answer:</u>
0.00926
<u>Explanation:</u>
no. of moles = mass ÷ molar mass (RMM)
Molar mass of Al is 27.
∴ no. of moles = 0.25 ÷ 27
= 0.00926 moles (3 s.f.)
A theory fits all three of these descriptions. you can test, predict, and prove or disprove a theory. hope this helps!